White and infrared light continuous photobioreactors for resource recovery from poultry processing wastewater - a comparison

Hulsen, Tim and Hsieh, Kent and Tait, Stephan and Barry, Edward M. and Puyol, Daniel and Batstone, Damien J. (2018) White and infrared light continuous photobioreactors for resource recovery from poultry processing wastewater - a comparison. Water Research, 144. pp. 665-676. ISSN 0043-1354


Concentrated wastewaters from agricultural industries represent a key opportunity for the upcycling of organics, nitrogen and phosphorus to higher value products such as microbial protein. Phototrophic or photosynthetic microbes very effectively capture input organics and nutrients as microbial protein. This study compares purple phototrophic bacteria (PPB) and microalgae (photosynthesis) for this purpose, treating real, high strength poultry processing wastewater in continuous photo bioreactors utilising infrared (IR) and white light (WL) respectively. Both reactors could effectively treat the wastewaters, and at similar loading rates (4 kgCOD m−3d−1). The infrared reactor (IRR) was irradiated at 18 W m−2 and the white light reactor (WLR) reactor at 1.5–2 times this. The IRR could remove up to 90% total chemical oxygen demand (TCOD), 90% total nitrogen (TN) and 45% total phosphorus (TP) at 1.0 d hydraulic retention time (HRT) and recover around 190 kg of crude protein per tonne of influent COD at 7.0 kWh per dry tonne−1 light input, with PPB dominating all samples. In comparison, the WLR removed up to 98% COD, 94% TN and 44% TP at 43–90% higher irradiance compared to the PPB reactor. Microalgae did not dominate the WLR and the community was instead a mix of microbes (algae, bacteria, zooplankton and detritus – ALBAZOD) with a production of approximately 140 kg crude protein per tonne influent COD.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Agricultural, Computational and Environmental Sciences
Date Deposited: 18 Feb 2019 04:35
Last Modified: 13 May 2019 00:17
Uncontrolled Keywords: agri-industrial; resource recover; wastewater; photobioreactor; PPB
Fields of Research : 09 Engineering > 0907 Environmental Engineering > 090703 Environmental Technologies
Identification Number or DOI: 10.1016/j.watres.2018.07.040
URI: http://eprints.usq.edu.au/id/eprint/35771

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